# CIS Ubuntu 14.04 LTS - 1.3.2 Ensure filesystem integrity is regularly checked

> Verify that filesystem integrity checking is scheduled via cron to detect unauthorized changes

- Skill: `cyberstrikeus/cis-ubuntu-14-04-lts-1-3-2-ensure-filesystem-integrity-is-re` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu-14-04-lts-1-3-2-ensure-filesystem-integrity-is-re`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu-14-04-lts-1-3-2-ensure-filesystem-integrity-is-re/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: cyberstrikeus (https://skillmd.com/u/cyberstrikeus)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/cyberstrikeus/cis-ubuntu-14-04-lts-1-3-2-ensure-filesystem-integrity-is-re

---


# 1.3.2 Ensure filesystem integrity is regularly checked (Scored)

## Profile Applicability

- Level 1 - Server
- Level 1 - Workstation

## Description

Periodic checking of the filesystem integrity is needed to detect changes to the filesystem.

## Rationale

Periodic file checking allows the system administrator to determine on a regular basis if critical files have been changed in an unauthorized fashion.

## Audit Procedure

Run the following commands to determine if there is a cron job scheduled to run the aide check:

```bash
crontab -u root -l | grep aide
grep -r aide /etc/cron.* /etc/crontab
```

Ensure a cron job in compliance with site policy is returned.

## Expected Result

A cron job entry for AIDE should be returned showing scheduled integrity checks.

## Remediation

Run the following command:

```bash
crontab -u root -e
```

Add the following line to the crontab:

```
0 5 * * * /usr/bin/aide --config /etc/aide/aide.conf --check
```

## Default Value

No AIDE cron job is configured by default.

## Notes

The checking in this recommendation occurs every day at 5am. Alter the frequency and time of the checks in compliance with site policy.

## References

- CIS Controls: 3.5 Use File Integrity Tools For Critical System Files

## Profile

- Level 1 - Server
- Level 1 - Workstation